<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <script src="../js/vue.js"></script>
</head>
<body>
  <div id="app">
    <p v-html="msg">123</p>
  </div>
<br>
  <script>
    let app = new Vue({
      el:"#app",
      data:{
           msg:'<h1>Hello China!</h1>'
       }
     })
   </script>
</body>
</html>